Física, poesia: convergências

Departamento de Física de Partículas

A brief review of the development of Chern-Simons gauge theory since its relation to knot theory was discovered in 1988 is presented. The presentation is done guided by a dictionary which relates knot theory concepts to quantum field theory ones. From the basic objects in both contexts the quantities leading to knot and link invariants are introduced and analyzed. The quantum field theory appro...

Departament Física i Enginyeria Nuclear, FIB, UPC,

1 Instituto de Física, Universidade Federal Fluminense,

It is known now that chiral symmetry restoration requires the meson-nucleon coupling to be density dependent in nuclear-matter mean-field models. We further show that quite generally, the quark and gluon condensates in medium are related to the trace of energy-momentum tensor of nuclear matter and in these models the incompressibility, K, must be less than thrice the chemical potential, μ. In t...

NLP-enhanced Content Filtering Within the POESIA Project

This paper introduces the POESIA internet filtering system, which is open-source, and which combines standard filtering methods, such as positive/negative URL lists, with more advanced techniques, such as image processing and NLP-enhanced text filtering. The description here focusses on components providing textual content filtering for three European languages (English, Italian and Spanish), e...

Architecture du système POESIA de filtrage de contenu Internet

POESIA est un logiciel libre (sous licence GPL) de filtrage de contenu Internet, pour protéger la jeunesse de contenus inappropriés. Il est multi-canal (Web, SMTP, NNTP...) et multi-modal (texte, image...). Il est bâti autour d’un moniteur, échangeant avec des sources externes, et des filtres dédiés par un protocole spécifique mais extensible. Ces filtres traitent le langage naturel, les images...